User guide

Preliminary Datasheet
Off-line Primary Side Regulation Controller for Dimmable LED Driver AP1681
Jul. 2011 Rev. 1. 2 BCD Semiconductor Manufacturing Limited
2
Pin Configuration
M Package
(SOIC-8)
Figure 2. Pin Configuration of AP1681 (Top View)
Pin Description
Pin Number Pin Name Function
1
DIM Dimming control signal input
2
RD Full brightness level setting
3
RI Full dimming level setting
4
FB The feedback voltage sensing from the auxiliary winding
5
CS Primary current sensing
6
GND Ground. Current return for gate driver and control circuits of the IC
7
OUT Gate driver output
8
VCC Supply voltage of gate driver and control circuits of the IC
1
2
3
4
8
7
6
5
DIM
RD
RI
FB
CS
GND
OUT
VCC